[llvm] [LV][VPlan] Add initial support for CSA vectorization (PR #106560)

[Ramkumar Ramachandra via llvm-commits]

https://github.com/artagnon commented:

I've done a very rough initial review, to get the ball rolling. Can you kindly look at iv-select-cmp.ll (and associated tests) to increase test coverage to include negative tests as well? It would be nice if this patch created changes in iv-select-cmp.ll, although I'll need to review in more detail to find out why.

https://github.com/llvm/llvm-project/pull/106560